CVE-2025-55081: Eclipse Threadx Netx Duo

Critical severity, CVSS 9.1. EPSS: 0.4% chance of exploitation in the next 30 days.

In Eclipse Foundation NextX Duo before 6.4.4, a module of ThreadX, the _nx_secure_tls_process_clienthello() function was missing length verification of certain SSL/TLS client hello message: the ciphersuite length and compression method length. In case of an attacker-crafted message with values outside of the expected range, it could cause an out-of-bound read.

Affected products

• Eclipse Threadx Netx Duo: before 6.4.4.202503 (fixed in 6.4.4.202503)

Published 2025-10-15. Last modified 2026-10-08.